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Finding the Fourth Proportional to 652,030.40, 976,879.20 and 402,420.80

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Solution

The fourth proportional to 652,030.40, 976,879.20 and 402,420.80 is: 602,911.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,030.40 : 976,879.20 = 402,420.80 : x
  2. Step 2: Convert to fraction form
    652,030.40/976,879.20 = 402,420.80/x
  3. Step 3: Cross multiply
    652,030.40x = 976,879.20 × 402,420.80
  4. Step 4: Simplify right side
    652,030.40x = 393,116,509,167.36
  5. Step 5: Solve for x
    x = 393,116,509,167.36/652,030.40
  6. Step 6: Final answer
    x = 602,911.32

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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.