Home / 689,642,709.40-1,034,967,948.90-485,569,365.40

Finding the Fourth Proportional to 689,642,709.40, 1,034,967,948.90 and 485,569,365.40

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Solution

The fourth proportional to 689,642,709.40, 1,034,967,948.90 and 485,569,365.40 is: 728,708,827.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,642,709.40 : 1,034,967,948.90 = 485,569,365.40 : x
  2. Step 2: Convert to fraction form
    689,642,709.40/1,034,967,948.90 = 485,569,365.40/x
  3. Step 3: Cross multiply
    689,642,709.40x = 1,034,967,948.90 × 485,569,365.40
  4. Step 4: Simplify right side
    689,642,709.40x = 502,548,730,156,712,576
  5. Step 5: Solve for x
    x = 502,548,730,156,712,576/689,642,709.40
  6. Step 6: Final answer
    x = 728,708,827.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.