Home / 385,820.64-578,031.12-284,868.72

Finding the Fourth Proportional to 385,820.64, 578,031.12 and 284,868.72

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Solution

The fourth proportional to 385,820.64, 578,031.12 and 284,868.72 is: 426,786.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,820.64 : 578,031.12 = 284,868.72 : x
  2. Step 2: Convert to fraction form
    385,820.64/578,031.12 = 284,868.72/x
  3. Step 3: Cross multiply
    385,820.64x = 578,031.12 × 284,868.72
  4. Step 4: Simplify right side
    385,820.64x = 164,662,985,274.57
  5. Step 5: Solve for x
    x = 164,662,985,274.57/385,820.64
  6. Step 6: Final answer
    x = 426,786.36

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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.