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Finding the Fourth Proportional to 520,070.55, 780,689.03 and 402,264.15

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Solution

The fourth proportional to 520,070.55, 780,689.03 and 402,264.15 is: 603,847.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,070.55 : 780,689.03 = 402,264.15 : x
  2. Step 2: Convert to fraction form
    520,070.55/780,689.03 = 402,264.15/x
  3. Step 3: Cross multiply
    520,070.55x = 780,689.03 × 402,264.15
  4. Step 4: Simplify right side
    520,070.55x = 314,043,207,055.95
  5. Step 5: Solve for x
    x = 314,043,207,055.95/520,070.55
  6. Step 6: Final answer
    x = 603,847.32

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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.