Home / 871,011,115.20-1,306,516,672.80-790,389,547.20

Finding the Fourth Proportional to 871,011,115.20, 1,306,516,672.80 and 790,389,547.20

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Solution

The fourth proportional to 871,011,115.20, 1,306,516,672.80 and 790,389,547.20 is: 1,185,584,320.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,011,115.20 : 1,306,516,672.80 = 790,389,547.20 : x
  2. Step 2: Convert to fraction form
    871,011,115.20/1,306,516,672.80 = 790,389,547.20/x
  3. Step 3: Cross multiply
    871,011,115.20x = 1,306,516,672.80 × 790,389,547.20
  4. Step 4: Simplify right side
    871,011,115.20x = 1,032,657,121,423,642,624
  5. Step 5: Solve for x
    x = 1,032,657,121,423,642,624/871,011,115.20
  6. Step 6: Final answer
    x = 1,185,584,320.80

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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.