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Finding the Fourth Proportional to 761,658.90, 1,051,048.80 and 439,349.76

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Solution

The fourth proportional to 761,658.90, 1,051,048.80 and 439,349.76 is: 606,279.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    761,658.90 : 1,051,048.80 = 439,349.76 : x
  2. Step 2: Convert to fraction form
    761,658.90/1,051,048.80 = 439,349.76/x
  3. Step 3: Cross multiply
    761,658.90x = 1,051,048.80 × 439,349.76
  4. Step 4: Simplify right side
    761,658.90x = 461,778,038,028.29
  5. Step 5: Solve for x
    x = 461,778,038,028.29/761,658.90
  6. Step 6: Final answer
    x = 606,279.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.