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Finding the Fourth Proportional to 315,656.25, 473,485.59 and 78,998.28

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Solution

The fourth proportional to 315,656.25, 473,485.59 and 78,998.28 is: 118,497.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,656.25 : 473,485.59 = 78,998.28 : x
  2. Step 2: Convert to fraction form
    315,656.25/473,485.59 = 78,998.28/x
  3. Step 3: Cross multiply
    315,656.25x = 473,485.59 × 78,998.28
  4. Step 4: Simplify right side
    315,656.25x = 37,404,547,214.79
  5. Step 5: Solve for x
    x = 37,404,547,214.79/315,656.25
  6. Step 6: Final answer
    x = 118,497.72

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1.5x scale

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.