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Finding the Fourth Proportional to 1,187,480, 1,638,728.16 and 710,552

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Solution

The fourth proportional to 1,187,480, 1,638,728.16 and 710,552 is: 980,565.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,480 : 1,638,728.16 = 710,552 : x
  2. Step 2: Convert to fraction form
    1,187,480/1,638,728.16 = 710,552/x
  3. Step 3: Cross multiply
    1,187,480x = 1,638,728.16 × 710,552
  4. Step 4: Simplify right side
    1,187,480x = 1,164,401,571,544.32
  5. Step 5: Solve for x
    x = 1,164,401,571,544.32/1,187,480
  6. Step 6: Final answer
    x = 980,565.21

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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.