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Finding the Fourth Proportional to 315,386.48, 473,152.16 and 90,748.77

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Solution

The fourth proportional to 315,386.48, 473,152.16 and 90,748.77 is: 136,144.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,386.48 : 473,152.16 = 90,748.77 : x
  2. Step 2: Convert to fraction form
    315,386.48/473,152.16 = 90,748.77/x
  3. Step 3: Cross multiply
    315,386.48x = 473,152.16 × 90,748.77
  4. Step 4: Simplify right side
    315,386.48x = 42,937,976,089.10
  5. Step 5: Solve for x
    x = 42,937,976,089.10/315,386.48
  6. Step 6: Final answer
    x = 136,144.00

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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.