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Finding the Fourth Proportional to 720,063, 993,686.94 and 402,111

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Solution

The fourth proportional to 720,063, 993,686.94 and 402,111 is: 554,913.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,063 : 993,686.94 = 402,111 : x
  2. Step 2: Convert to fraction form
    720,063/993,686.94 = 402,111/x
  3. Step 3: Cross multiply
    720,063x = 993,686.94 × 402,111
  4. Step 4: Simplify right side
    720,063x = 399,572,449,130.34
  5. Step 5: Solve for x
    x = 399,572,449,130.34/720,063
  6. Step 6: Final answer
    x = 554,913.18

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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.