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Finding the Fourth Proportional to 663,345.76, 915,417.48 and 376,866.40

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Solution

The fourth proportional to 663,345.76, 915,417.48 and 376,866.40 is: 520,075.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,345.76 : 915,417.48 = 376,866.40 : x
  2. Step 2: Convert to fraction form
    663,345.76/915,417.48 = 376,866.40/x
  3. Step 3: Cross multiply
    663,345.76x = 915,417.48 × 376,866.40
  4. Step 4: Simplify right side
    663,345.76x = 344,990,090,184.67
  5. Step 5: Solve for x
    x = 344,990,090,184.67/663,345.76
  6. Step 6: Final answer
    x = 520,075.82

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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.